You need a bias correction for sample estimates of the variance because samples systematically overestimate population variance.

Name: You need a bias correction for sample estimates of the variance because samples systematically overestimate population variance.
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Sample estimates of variance tend to underestimate the population variance, not overestimate it, which is why a bias correction (using n-1 instead of n) is applied.

You Need a Bias Correction for Sample Estimates of the Variance